Directory Comparer?

Does anyone know of a good tool to compare two directories and tell me the differences between them? I've got a couple of directories, each with about 3,000 pictures in them (convienienty named DSC_****.JPG) that are about 95% the same. I want something to quickly tell me what files are in one that aren't in the other. I could probably whip up a quick UNIX shell script, except that this is a Windows box. Google brought up the usual list of generic spyware that I don't particularly trust. Anyone know of anything that might do what I need?

Oh, and all I need it to compare is filenames. It doesn't need to, and in fact should NOT check if the files themselves are identical (which is part of why I can't use rsync).

Jam it back in, in the dark.

Cool. Thanks. I ended up just booting into Gentoo and writing a shell script after all. I gave in. That tool could have been useful, however.

There's nowhere I can't reach.

Originally Posted by Duminas

Might you post that here? I'm curious how you went about it, since I can't figure much of an idea for it, and this would be useful.

If you don't mind, of course.

The version I wrote was just a simple thing which essentially mixed "for i in '(ls -A $1)']; do" with "if [-e $2/$i]". It didn't check for subdirectories, symbolic links, or any of the other obvious error checking that a truly useful script would since it was just a one-time thing.

However, a quick bit of Googling found cmptree, which is kind of what I wanted except on steroids.

#!/bin/bash
#
# cmptree: compare directory trees recursively and report the differences.
# Author: Ives Aerts

function gettype () {
  if [ -L $1 ]; then
    echo "softlink"
  elif [ -f $1 ]; then
    echo "file"
  elif [ -d $1 ]; then
    echo "directory"
  else
    echo "unknown"
  fi
}

function exists () {
  if [ -e $1 -o -L $1 ]; then
    return 0;
  else
    echo "$1 does not exist."
    return 1;
  fi
}

function comparefile () {
  cmp -s $1 $2
  if [ $? -gt 0 ]; then
    echo "$1 different from $2"
#  else
#    echo "$1 same as $2"
  fi
  return
}

function comparedirectory () {
  local result=0
  for i in `(ls -A $1 && ls -A $2) | sort | uniq`; do
    compare $1/$i $2/$i || result=1
  done
  return $result
}

function comparesoftlink () {
  local dest1=`ls -l $1 | awk '{ print $11 }'`
  local dest2=`ls -l $2 | awk '{ print $11 }'`

  if [ $dest1 = $dest2 ]; then
    return 0
  else
    echo "different link targets $1 -> $dest1, $2 -> $dest2"
    return 1
  fi
}

# compare a file, directory, or softlink
function compare () {
  (exists $1 && exists $2) || return 1;

  local type1=$(gettype $1)
  local type2=$(gettype $2)

  if [ $type1 = $type2 ]; then
    case $type1 in
      file)
        comparefile $1 $2
        ;;
      directory)
        comparedirectory $1 $2
        ;;
      softlink)
        comparesoftlink $1 $2
        ;;
      *)
        echo "$1 of unknown type"
        false
        ;;
    esac
  else
    echo "type mismatch: $type1 ($1) and $type2 ($2)."
    false
  fi

  return
}

if [ 2 -ne $# ]; then
cat << EOU
Usage: $0 dir1 dir2
Compare directory trees:
  files are binary compared (cmp)
  directories are checked for identical content
  soft links are checked for identical targets
EOU
  exit 10
fi

compare $1 $2
exit $?

This thing is sticky, and I don't like it. I don't appreciate it.